According to the book's publisher, Hachette, it is about the 20-year-old activist's wish for a magic pencil that could make people happy, sleep in a little longer in the morning and not have to smell the powerful stench of garbage in her city. As she got older though, she began to wish for something more important when she discovered what really needed to be fixed in the world.

It will be released October.

It seems a lot of people can't wait to have a read themselves. Here' some of what they tweeted: